I flew from seattle to London last summer and didnt see one dog at the airport. I think that it is somewhat random, like they randomly choose a few days out of the month to have k-9's on patrol.

but dude, why risk going to jail when you could pick up some bud the day you get off the plane! Just go to a beach and ask around and I garrauntee you will find some bro.

Or Let me know when you are going, Ill fly down ahead of time, grow some, and give it to you when you get here. just let me know man!